Dental x-ray system



Dec. 15 1925- 1,566,l 9 8 w i H D. GARRETSON DENTAL X-RAY sysrEu FiledFeb. 65 1924 sheets-sheqt 1] INVENTQD'R J. 295love Jif y ATTORNEY Dec.15, 1925- 5 ,19 8

. H. D. GARRETSON DENTAL X-RAY SYSTEM Filed Feb. 6, 1924 2 Sheets-Sheet2 IIIIIIIIII I INVENTOR Jury/Z firrelf'ia BY I ATTORNEY H may 1:.eam'reox, on NEW Yonx, N.

DENTAL X-RAY SYSTEM.

' Application flea February a, 1934. Serial In. season i of the city,

Be it known that I, HARRY D. Gannn'rson',

a citizen of the United States, and a resident county, and State of NewYork,

have invented anew and useful lmprovethe following'is a 'specification.

The object of ment in Dental XRay' Systems, of which,

tra'nsformer' ma be put on an arm of a dentist chairv an there clampedand the X- means of a ray tube bevconnected to this transformer byflexible connection which can be handled so that under all circumstancesit is possible to take small radiographs without-- inconvenience ordanger due to'the'hi' h tential currents em loyed.. This an m er objectsare accomp ished by my invention,

some embodiments of which .arehereinafter.

more particularly set forth.

For a more detailed descriptionofmyin-f vention, reference is to be hadto the accompanying drawings,

xproved apparatus in use.

vso.

Figure 2 is a diagrammatic'view showing I the electrical'connectionsandcircuits.

-. tube and the partsw -Figure 4 is a sectional 3, looking in the'dire'c- Y which is clam tion of the-'arrows;f I

- Throughout the various views ofthe draw L ings 'sixnil -;Figure 3 vialongitudinalsectionof the view, taken on" th line H of Figuresiml arparts. "In the preferred embodiment of my invention, a dbntistchair'1has an-a'rm 2 on va suitable transformer; 3 power through wires 4 larreference characters designate which is supplled by I and 5 which arepreferably low potential ,wires joined in a cable 7 The transformer is asmall step -1 of this invention shown in Figure 2, power 6 in theconventional manner.

the tube is immersed in oil-10 and .50 arranged and, disposed that Xrays may e projected through a funnel 11 and through a patient 12 whileheld by a dentist '13, as

9 where my invention is to provide v a system of this class'which mayhoused in the smallest possible space and which may be readily detachedand removed when not; in use and" particularly a system in' which arowin part erm t n" ich enclose it.

r the step up transformer "Volta 'and t e casing, thus reducing theinsulation.

sulation required and 18 must be suflicient for twenty thoulvide this.insulation, carefully prep 'sulatin'g material is inserted in two metala u transformer with high potential wires zw hich pass through afiexibletube- 7 'to'the X-ray tube 8 in a suitable protecting casingifcated in Figure 1. In the embodiment is broad enough to cover allstructures' th g -lr is supplied through the 4 5 which power runs to thetransformer 3 which has a primary Hand a secondary 15 with a milliamperemeter 16 at the neutral point and also a ground 17 at the neutral point.Fromthis secondary 2, wires 18 and,

19'are connected to the anode and cathode ofthe tube 8. 1 I

The wire 4 is also connected to a wire 20 which runs to a small rheostat21 which-is connected' by a wire 22 with the primary 23.,

of'a step 'down transformer 24-which also has a connection w iththe.wire 5, as shown. The secondary 25 of this step down transformer 24 hastwo wires, .one of which is connected to the wire 19 and the other wire26 runs to the cathode of the tube& From wire 19cand both' are encasedin a .flexible tube28..

of .my improved system wi be readily unagainst the patient. he'rheostat21 is mampulated until the milliampere meter--16 1 not shown; vThegroundin of the center of uces the effective between the conductors19-and-18 to half, so that if say forty thousand volts are required to 0rate the tube 8, the intween the conductors 19 sand volts on each and ifthis be the case therewill be no shortcircuitingg To ro-- tubes 27 and28, as above described. The-- be flexed as much as desired." The oil 10surrounding the tube'8 issuflicient to keep. the terminals Y thoroughlyinsulatd.

While I have shown and de'scribed one embodiment of my'invention, .it'isobvious G that it is not restricted thereto, but the-tit lead in wiresand.

the transformer 3 extend the wires '18 and; 19 and the wire 26 isbrought close to the 'tube27 while the wire 18 .isenca ed in a- In view"o f -theforegoin "the operation I derstood. .The cable 6 'isconnected toa 78-9- sw tch, notv shown, and placed in an desired locat on orad'acentto the trans ormer 3 and the trans ormer is clamped-to an arm 2and then the pro'ection .111is pressed b y g v d by an'automatic'switch,"

result is that the tube 7 and its contents m'ayfl i come within thescope of the annexed claims.

Having thus described my invention, what I claim 1s: r

1. In an apparatus of the class described, a transformer, a flexibletube'connected to said transformer, an X-ra tube connected to andcarried by said exible tube and means for supplymg the X-ray tube withpower'through said flexible tube.

2. In an apparatus ofthe class described, a step up transformer, meansfor supplying the same with power, a flexible tube connected to saidtransformer, high potential conductors in the said flexible tube, acasing carried by said flexible tube and at the free end thereof and anX-ray tube employed in said casing" and connected to said highpojtential conductors. I i

3 In an apparatus of the class described,

.2 a step up and ste down transformer adapted to be secure to the arm ofa dentlst chair, means for supplying the'transformer with power, meansfor regulating the cur-.

1,5-ee,1es

rent of the step down part or" the trane former, high potential wiresrunning from said transformer adapted to carry anX-ray generatingcurrent and a cathode heating.

current, a flexible tube containing said wires and an X-ray tubeconnected to said wires and carried by said flexible tube, whereby a hih potential current may be passed to the tu eand X-rays generated whilethe tube is supported manually. v v

4;. In an apparatus of'the class described, a step up transformer, aflcxibletube connected to said transformer, high potential I wirespassing from said transformer, a

groundfor the neutral point of the step up c011 of the transformerand anX-ray tube connected to said high potential wires at Eh? other end ofthe tube and carried by this In testimony whereof, I have hereunto setmy hand th s 23 day of January, 1924.

, HARRY n. GARR-ETSON. y

